Cellulose fibers, fabrics and articles



Patented May 19, 1931 UNITED STATES PATENT OFFICE GAMBLE DREYFUS, OF NEW YORK, N. Y.,

AND HERBERT PLA'IT, OF CUMBERLAND,

MARYLAND, ASSIGNORS TO CELANESE CORPORATION OF AMERICA, A CORPORATION OF DELAWARE CELLULOSE FIBERS, FABRICS AND ARTICLES No Drawing.

Example N 0. 1.-One 1) part of artificial silk made from cellulose acetate is treated 16 with thirty (30) parts of 40 Tw. solution of stannic chloride (SnCh) during one-half hour, at a temperature between 40 and 50 0., then rinsed oil in water, then treated with 7 Tw. solution of di-sodium hydrogen phosphate (Na HPO and rinsed again, and then treated with 7 Tw. solution of sodium silicate, and washed with or without soap solution. The result will be a substantial increase in weight and volume of the i fibers, fabrics and articles.

Example N 0. 2.One (1) part'of cellulose acetate artificial silk is treated with thirty parts of stannic chloride solution of 40 Tw., at a temperature between and 30 55 C., during one-half A hour. Then rinse ofi in water and treat with sodium silicate 7 Tw. and wash with or without soap solution. The result will be a substantial increase in weight and volume of the fibers,

35 fabrics and articles.

Example No. 3.One 1) part of cellulose acetate artificial silk is treated with thirty (30) parts of 40 Tw. solution of stannic chloride, during one-half hour, at a temperature between 55 and 65 (3., then rinsed ofi in water and treated with 7 Tw. sodium silicate solution, and washed with or without soap solution. The increase in weight and volume is larger in this case than under Example No. 2.

Application filed September 22, 1925. Serial No. 57,956.

Theseexample are only descriptive and not limited and the temperature, as well as the time, can be varied within limits, as well as the strength of the stannic chloride and disodium hydrogen phosphate and sodium silicate solution within limits. In case, for instance, the temperature should be raised, it is advantageous to reduce the time of action of the stannic chloride. Instead of stannic chloride other metal salts, like zinc chloride, can be used, which are swelling agents for the cellulose acetate or for the cellulose ester or cellulose ethers, or other metal salts can also be used which are only slight swelling agents for the particular fiber, when they are used in conjunction with a swelling agent of the particular fiber. This process can be applied to the fiber itself as well as to a fabric made out of this fiber; for instance a fabric made of 100% cellulose acetate silk. The operations described in above examples can be repeated once or several times if it is desired to get a larger increase of volume and Wei ht.

This process has a very beneficial efiect on cellulose acetate fabrics. Apart from the increase of volume and weight it reduces the slipping of'the fabrics and it conveys to the fabrics a fire-proof character or rather very heat resistant character, as it is a well known fact that cellulose acetate silk fabrics melt with a too hot an iron. After the ap lication of this treatment no such melting ta es lace by treatment with a hot iron. It also uces the infiammability of the fibers, fabrics and articles. Furthermore, for instance, a circular knitted fabric made with cellulose acetate silk and treated according to this process will show reduction in the laddering capacity of the fabric when treated according to the above process.

Instead of cellulose acetate, other cellulose esters of organic nature, or cellulose ethers can be used such as the butyrate, propionate, methylate, or ethylate of cellulose, and this process can done with the fiber alone or fabrics consisting of 100% cellulose acetate or cellulose esters or ethers, or fabrics containin partly cellulose acetate and partly other bers like silk, etc.

For convenience the fibers, fabrics or other.

articles will be designated the claims as materials. Also to avoid alte'rnativeness of expression, the cellulose esters, ethers, and the like, will be generically termed organic substitution derivativesof cellulose. t

Insteador' artly instead of di-sodiuin hydro en phosp ate and sodium. silicate-,tannic aci can be used in above examples. The term fweighting is used in the appended claims in the ordinary technical sig- ,whichconsists in swelling and impregnating :the metal in said material 'said material with a salt of a weighting metal in solution, and subsequently treating to fix as an insoluble salt.

. I A rocess for the weighting of material mpr n a organic derivative of cellulose, which consists in swelling and impregwith a salt of a weightnating said material and subsequently fixing metal in solution,

ing the metal in said material as an insolublesilicate. .3. A comprising which consists rocess for the weighting of material an organic derivative ofcellulese, in swellingand impregnating said material with a salt of a weighting metal v in solution, and subsequently treat ng with v a soluble phosphate and a .soluble silicate to with alkali silicate to material as. an insoluble silicate. o

6. A process for the weightingpfimaterial which consists in'swelling and impregn g "fix themetalin saidmaterialin the form of its correspondinginsoluble salts. 4'. rocess 01 the lweighting of material comprismg an organic derivative of cellulose,

'which consists in swelling and impregnating said material with a chloride oj a weighting metal in solution, and subsequently treating to fix the metal in said material an insoluble salt.

, 5. A rocess fortlie Weighting of material comprising an organic derivative oft cellulose,

:which consists in swelling and impregnating lsaidmaterial with a chloride of a weigliting metal in solution, and subsequentlytreating fix the metal in sai an organic derivativeoficellulese,

comprising t a ing saidj material with a chloride ofa weighting metal'in solution, and subs 'que tly. treating lrail comprising an organic lulose, which consists in swelling and imrial comprising an organic lulose, v pregn'ating said .from 40-65 C. with stannic chloride insolu- .an insoluble salt.

cate to fix the metal in said material in the form of its corresponding insoluble salts.

7. A rocess for the weighting of material comprising an organic derivative of cellulose, which consists in swelling and impregnating said material at a temperature of from 4065 O. with a chloride of a weighting metal in solution, and subsequently fixing the metal in said material as an insoluble salt.

8. A process for the weightin g of material comprising an organic derivative of cellulose, which consists in swelling and impregnating said material with stannic chloride in solutiori, and subsequently treating to fix the tin in said material as an insoluble saltl' 9. A process for the weighting of material comprising an organic derivative of cellulose, which consists in swelling and impregnating said material with stannicchloride in solution, silicate to fix the tin in said material as an insoluble silicate.

10. A process for the weighting of material comprising an organic derivative of cellulose, which consists in swelling and impregnating said material with stannic chloride in solution, and alkali phosphate and an alkali silicate to fix the tin in said material in the form of its correspondinginsoluble salts.

.11. A process for the weighting of material comprising an organic derivative of cellulose which consists in swelling and imregnating said material at a temperature of cm 4065 C. with stannic chloride in solution, and subsequently fixing the tin in said material, as an insoluble salt.

12. A process for the weighting of mate- .rial comprising an organic derivative of cellulose, which consists in swelling and imregnating said material at-a temperature of tom 40-65 C. with stannic chloride in solution, and subsequently fixing the tin in said material as an insoluble silicate. v 13. A process for the weighting of matederivative of celpregnatingsaid material at a temperature 'of from .40 C.'W1tl1 stannic chloride in solution, and subsequently treating with a "soluble phosphate and a soluble silicate to fix the tin in said material in the form of its corresponding insoluble salts.

14. Aprocess for the weighting of matederivative of celwhich consists in swelling and immaterial at a temperature of and, subsequently treating at a lower tion , to fix the tin in said material as temperature 15. A p'rocess for theweighting of material comprising cellulose acetate, which conimpregnating said masist's in swell ng and subsequently treating with an I terial with a salt of a weighting metal in $0111- tion, and subsequently treating to fix the meal in said material as an insoluble salt.

16. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregating said material with a salt of a weighting metal in solution, and subsequently fixing the metal in said material as an insoluble silicate.

17. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregnating said material with a salt of a weighting metal in solution,'and subsequently treating with a soluble phosphate and a soluble silicate to fix the metal in said material in the form of its corresponding insoluble salts.

18. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregnating said material with a chloride of a weighting metal in solution, and subsequently treating to fix the metal in said material as an insoluble salt.

19. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregnating said ma-- terial with stannic chloride in solution, and subsequently treating to fix the tin in said material as an insoluble salt.

20. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregnating said material with stannic chloride in solution, and subsequently treating with alkali silicate to fix the tin in said material as an insoluble silicate.

21. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregnating said material with stannic chloride in solution, and

material in the form of its corresponding insoluble salts.

25. A process for the weighting of material comprising cellulose acetate, which consistsin swelling and impregnating said miterial at a temperature of from 40-65 C. with stannic chloride in solution, and subsequently treating at a lower temperature to fix the tin in said material as an insoluble salt.

In testimony whereof, we have hereunto subscribed our names.

' CAMILLE DREYFUS.

H. PLATT.

subsequently treating with an alkali phosphate' and an alkali silicate to fix the tin in i said material in the form of its corresponding insoluble salts.

22. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregnating said material at a temperature of from 40-65 C. with stannic chloride in solution, and subsequently fixing the tin in said material as an insoluble salt. 7

23. A process for the weighting of material comprising cellulose acetate, which consists in swelling and-impregnating said material at a temperature of from 4065 C. with stannic chloride in solution, and subsequently fixing the tin in said material as an insoluble silicate.

24. A process for the weighting of material comprising cellulose acetate, which consists in swelling and impregnating said material at a temperature of from ID- Cfwith stannic chloride in solution, and subse- 

